The
sun
is
a
____________________
,
and
it
is
very
important
for
our
planet
earth
.
It
gives
us
light
and
heat
.
However
,
Earth
is
not
alone
.
It
shares
the
sun
with
seven
other
____________________
.
Together
,
these
planets
revolve
around
the
sun
in
a
solar
____________________
.
Other
bodies
travel
in
this
solar
system
,
such
as
moons
,
asteroids
,
and
____________________
.
They
all
move
around
the
sun
because
the
sun
?
s
____________________
is
very
strong
.
Each
planet
?
s
path
around
the
sun
is
called
an
____________________
.
The
planets
that
are
closer
to
the
sun
have
smaller
orbits
,
so
they
take
less
time
to
go
around
it
.
Mercury
takes
88
days
to
complete
one
orbit
.
Earth
completes
one
orbit
in
365
days
,
or
one
____________________
.
Neptune
?
s
orbit
takes
60
,
200
days
,
or
almost
165
years
!
Each
planet
in
our
solar
system
is
____________________
.
For
example
,
Mercury
is
the
smallest
planet
.
It
has
lots
of
____________________
,
just
like
our
moon
.
Jupiter
is
the
biggest
planet
.
Its
diameter
is
eleven
times
bigger
than
Earth
?
s
.
Saturn
has
giant
rings
of
____________________
around
it
.
Neptune
is
the
farthest
planet
from
the
sun
.
Mars
is
a
neighboring
planet
,
and
scientists
are
learning
a
lot
about
it
.
They
send
many
space
____________________
to
Mars
.
A
space
probe
called
Curiosity
landed
on
Mars
on
August
6
,
2012
.
Curiosity
is
as
big
as
a
car
,
and
it
moves
over
the
____________________
of
Mars
.
It
recently
found
rocks
that
had
strange
shapes
.
Running
water
made
these
shapes
.
This
is
an
important
discovery
.
Space
probes
like
Curiosity
continue
to
explore
the
planets
,
moons
,
and
other
bodies
in
our
solar
system
.
If
technology
continues
to
grow
,
we
will
travel
to
these
places
ourselves
.
Iron
and
rock
make
up
most
of
the
four
smaller
inner
planets
of
our
solar
system
.
Gas
and
water
make
up
most
of
the
four
larger
outer
planets
.
This
means
that
you
can
stand
on
the
surface
of
Earth
,
but
you
can
?
t
stand
on
Saturn
.
In
____________________
,
if
you
tried
to
stand
on
Saturn
,
you
would
sink
down
to
the
____________________
of
the
planet
.
Drawings
of
our
solar
system
show
the
planets
close
to
the
sun
.
However
,
the
____________________
between
the
planets
and
the
sun
is
very
far
.
For
example
,
it
would
take
176
years
to
drive
a
car
from
Earth
to
the
sun
.
It
would
take
5
,
300
years
to
drive
from
Neptune
to
the
sun
!
____________________
think
that
there
are
many
solar
systems
in
our
Milky
Way
galaxy
.
However
,
our
solar
system
is
special
to
us
.
It
is
our
____________________
.
